[ClusterLabs] 2 active node with different service and 1 passive

[Ken Gaillot]

On Tue, 2018-07-31 at 13:10 +0530, Vivek Singh Rai (Software
Development) wrote:
> Hi,
> 
> I want help to setup 3 node of which 2 node is active and 1 is
> passive for both the nodes.
> 
> i.e - 
> 1 - node 1 (Active) and node 3 (Passive)
> 2- node 2 (Active) and node 3 (Passive)
> 
> 
> How to achieve this.
> 
> 
> 
> --Vivek

Constraints can handle that:

http://clusterlabs.org/pacemaker/doc/en-US/Pacemaker/2.0/html-single/Pa
cemaker_Explained/index.html#idm140330730796720

Location constraints determine which nodes are preferred for which
resources. Colocation and ordering relate resources to each other.

For example, if resource R prefers node 1, can fall back to node 3, and
can never run on node 2, you could use three location constraints: R on
node 1 with a positive score (e.g. 1000), R on node 3 with a smaller
positive score (e.g. 500), and R on node 2 with a -INFINITY score.
-- 
Ken Gaillot <kgaillot at redhat.com>